Control valve device



April 14, 1942- 5.. E. VON BEHREYNQ' 2,279,424

CON TROL VALVE DEVICE Filed May 51, 1940 l v .4- e

i FEE-5- NEUTRAL POSITION LEFT.

RIGHT CONTROL POSITION CONTROL POSITION LEFT CONTROLPOSITlO-N I61 I mum/ME;

RIGHT CONTROL POSITION INVENTOR EDWARD E.v0N BEHREN ATTORNEY Patented Apr. 14-, 1942 ear FUSE

CONTROL VALVE DEVICE Application May 31, 1940, Serial No. 338,249

14 Claims.

This invention relates to manually operative control valve devices and more particularly to the type for controlling fluid responsive motors or the like, especially motors of the double actgree depending upon the degree of manual movement or setting of the device.

Other objects and advantages will appear in the following more detailed description taken in connection with th accompanying drawing, in which Fig. l is a diagrammatic view, mainly in section, of a manually operative control valve device embodying m invention, one form of fluid pressure motor to which the device is applicable being shown diagrammatically.

Fig, 2 is a diagrammatic view of the ports in the rotary valve of the control valve device shown in Fig. 1.

Fig. 3 is a plan view on a reduced scal of the The piston 5 has a rod 8 secured thereto which extends through an end wall of the cylinder, the opening through which the rod extends being sealed by means of suitable packing held in place in the usual manner by a packing nut 9. Exteriorly of the casing the end of this rod may be operatively connected to the apparatus (not shown) tobe operated.

The control valve device 3 is provided for the purpose of controlling the operation of the fluid pressure motor I. This device comprises aselector valve portion Ill and a self-lapping pressure regulating portion II.

The selector valve portion [0 comprises a body section i2 and a bracket section I3 which are secured together in any suitable manner, there being a sealing gasket 14 interposed between the sections l2 and Hi. When secured together these sections form a rotary valv chamber 16, which is constantl open to a flexible fluid conducting supply and release conduit I! by way control valve device with the handle shown in i 1 neutral position.

Referring to Fig. 1 of the drawing, the system therein illustrated comprises a double acting fluid pressure motor I which may be employed for controlling the opening and closing of doors or for controlling the operation of a power operated clutch or other device, a supply reservoir 2 adapted to be charged with fluid under pressur in any suitable manner, and a manually operative control valve device 3.

The double acting fluid pressure motor comprises a cylinder 4 in which is mounted a piston 5. At one side of the piston 5 is a chamber 6 and at the other side thereof is a chamber 1. Contained in chamber 6 is a spring M which is interposed between and operatively engages one side of the piston 5 and the end wall of chamber 5 and contained in chamber I is a spring 42 which is interposed between and op- 25! formed on the body section [2.

of a passage l8 formed in the bracket section l3. The chamber It has mounted therein a rotary valve 19 which is held by means of a spring 2|, in seating engagement with a seat The rotary valve I9 is adapted to b operated by means of a shaft 22 which extends vertically through and is rotatably mounted in a central bore 23 in the body section [2, the lower end thereof being operatively connected to the rotary valve 19, as shown in Fig. 1 of the drawing.

The upper end of the shaft 22 is provided with anextension 25 of smaller diameter than the main portion, which extension projects into a suitable aperture 25 formed in a rotatable casing 26 of the self-lapping pressure regulating portion H and which is secured to the casing 26 by means of a pin 21. The upper end of the central bore 23 is counterbored to receive a sealing ring like washer 28 interposed between the body section l2 of the selector valve portion and the casing 26 of the self-lapping pressure regulating portion for preventing the entrance of dirt and moisture to the face of' the rotary valve. The body section I2 is further provided with a quadrant 29 which may be provided with any desired arrangement of detent notches or recesses to be engaged by a springpressed detent 30 carried by the casing 26 for indicating to the operator when the device reaches each position.

The casing 26 slidably rests on the body section I2 and above the upper end of the extension 24 of the shaft 22 is in the form of a cylinder 3l in which there is operatively mounted a piston assembly 32. The piston assembly 32 comprises a follower member 33 and a packing cup 34 which is clamped to the follower member by means of an annular valve seat member 35 which is rigidly secured to the follower member 33 in any desired manner.

At the valve seat side of the piston there is a chamber 36 which is in communication with the flexible conduit I! by way of a passage and pipe 31. The chamber 36 is also in communication with a passage 38 provided in a valve seat member 39 carried by the casing 26, which passage leads to a valve chamber whichis connected to the reservoir'z by way of a passage and pipe 45, a flexible conduit 46 and a passage and pipe 41. Contained in chamber" is a valve 48 which is adapted to engage a valve seat 49, formed on the valve seat member 39, to cut off the communication between this chamber and chamber 36. The valve 48 is provided with a fluted stem 58 which extends into the chamber 36 and for a portion of its length is surrounded by a sleeve member having at one end an annular flang 52 which abuts one side of the valve seat member 39. V

The end of the fluted, stem 58' terminates a short distance beyond the end of the sleeve member 5| and has secured thereto, in any desired manner, a valve 53 which is adapted to be engaged by the valve seat 54 carried by the valve seat member 35 of the piston as will hereinafter more .fully appear. The valve 53 is spaced a short distance from the end of the sleeve 5| and is normally held in this spaced relation by means of a spring 55 which is interposed between and operatively engages the valve and the annular flange on the sleeve. The force of this spring maintains the flange 52 of the sleeve in engagement with the valve seat member 39 and normally maintains the valve 48 seated to close the communication between the chambers 36 and 40. Also contained in chamber 36 is a spring 56 which is interposed between and operatively engages the face of the piston carried valve seat member 35 and the casing.

At the follower side of the-piston there is a chamber 60 which is in constant open communimovement of the handle to the right of neutral position will move the valve to its right control position, all of which will hereafter fully appear.

Interposed between and operatively engaging the plunger 62 and the follower 33 of the piston is a heavy spring H which normally maintains the piston in the position in which it is shown in Fig. 1 against the opposing pressure of the spring 56 at the opposite side of the piston.

The follower 33 is provided with a stem 12 having an extension 13 of smaller diameter than cation with the atmosphere through a passage Y.

6|. Contained in this chamber and slidably mounted in the casing is a hollow plunger 62 having one end open to the chamber, which end is provided with an annular collar or flange 63. The other end of the plunger is closed by means of a plug 64 which has screw-threaded connection with the plunger. The plug is hollow and at its outer end is closed by means of a nut 65 which has screw-threadedv engagement with the plug. It should here be noted that the nut 65 and adjacent end of the plunger 62 extend outwardly beyond the major portion 'of the casing. The plunger is operated through the medium of a roller 66 rotatably carried by a downwardly depending arm 61 of anoperating handle 68 pivotally mounted, for vertical movement, on a pin-69 carried byan extension 10 of the casing. It should herebe mentioned that the rotary valve l9 of the selector portion is selectively movable to each of at least three control positions. Hereinafter these portions will be termed neutral position, left control position and right control position. .It will here be understood that movement of the handle 68 in a horizontal plane to the left of neutral position will move the valve l9 to-its left control position and the stem, which extension .is slidably guided in the plug 64. The stem 12 is provided with a central bore I4 which registers with a corresponding bore in the follower member 33 and the valve seat member 35 and is further provided with a bore 15 which communicates with the bore 14 and the chamber 60.

With the piston assembly 32 in its normal position, as shown in Fig. 1, the valve'seat 54 of the valve seat member 35 will be spaced away from the valve 53 and the valve 48 will be in seating engagement with the seat 49. Under these conditions the. chamber IE will be in communication with the atmosphere by way of passage l8, flexible conduit l1, passage and pipe 31, chamber 36, past unseated valve 53 through the bores 14 and I5, chamber 60 and passage 61, and, as above described,'the valve 48 will be seated so that communication between chambers 36 and 48'will be cut off.

The chambers 6 and 'l of the fluid pressure motor are connected to the selector portion of the control valve device through pipes and passages 82 and 83,respectively.

Operation The apparatus is shown in Fig. l and Fig. 3 of the drawing in neutral position with the operating handle in its raised position, the handle being normally maintained in this position by means of the plunger 62 which in turn is maintained positioned, as shown, by the spring II.

With theselector rotary valve 19 in neutral position passages 82 and 83, and consequently the chambers 6 and I of the fluid pressure motor, are connected to the atmosphere through ports and 8| in the rotary valve and passage in the body section I 2. With the chambers 6 and 1. of the motor at atmospheric pressure the springs 4| and 42 serve to maintain the piston 5 in its neutral position as shown.

, The supply reservoir 2 is normally charged with fluid to anydesired pressure and since the reservoir is in constant communication with the chamber 40, this chamber will be charged with fluid to the same pressure. With the handle in its raised or uppermost position the valve 48 will be maintained seated in the manner hereinbefore described, thus preventing the flow of fluid from chamber 40 to chamber 36.

When it is desired to move the piston 5 of the fluid pressure motor toward the right from its neutral position, an operator, by the use of the handle 68, rotates the self-lapping regulating portion II and thereby the shaft 22 and rotary valve IS in a counterclockwise direction, that is to the left of neutral position until the detent 30,coacting with the quadrant 29 indicates that the rotary valve is in its left control position.

, With the rotary valve l9 in this position, the chamber 6 ofthe fluid pressure motor is connected to the rotary valve chamber 16 by way of pipe and passage 82 and passage 84 and cavity 98 in the valve. At the same time as this communication is established between the chambers 6 and I 6, the chamber 1 of the fluid pressure motor is connected to the atmosphere by way of pipe and passage 83, a cavity 9| in the rotary valve and the exhaust passage 85. This will be readily apparent from the diagrammatic arrangement shown in Fig. 2.

Now with the above communication established between chambers 6 and t6 the operator depresses the handle 68 of the control valve device 3 and as a result the roller 66, which engages the nut 65, actuates the plunger 62 toward the right from the position in which it is shown in Fig. 1 of the drawing. The degree of movement of the plunger depends upon the degree the handle is depressed from its raised or uppermost position.

Movement of the plunger 62 toward the right tends to compress spring H but the spring moves the piston assembly 32 toward the right against the opposing pressure of the relatively light spring 56. When the piston assembly has moved a short distance the valve seat member 35 thereof seats against the valve 53 and moves the valve and thereby the valve stem 5|] toward the right unseating valve 48. At substantially the same time as the valve 48 is unseated the enlarged portion of the valve stem 56 which carries the valve 53 is engaged by the sleeve 5! and thereby brought to a stop and the valve 53 in turn brings the piston assembly to a stop.

If, when the piston assembly is thus stopped, the operator depresses the handle 68 further, the spring H will be compressed and as a result Will tend to force the valve seat 54 into closer sealing the piston 5 and attached rod 8 to move toward the right against the opposing action of the spring 42 to effect operation of any apparatus which may be connected thereto.

Now when the pressure of fluid in the chamber 36 acting on the piston assembly is suflicient to overcome the opposing force of the spring H acting on the piston assembly 32, the assembly will be caused to move toward the left. On this movement of the piston assembly, the valve 48 is moved by the spring 55 relative to the valve seat member 39 until the valve 48 engages the valve seat 49, the spring 55 at the same time maintaining the valve 53 in engagement with the seat 54. When the valve 48 is thus seated the supply of fluid from chamber 40 to the chamber 36 is cut off, so that movement of the piston assembly toward the left will cease and since the valve 53 is held closed, the fluid under pressure in chamber 6 of the fluid pressure motor is retained.

The pressure to which the fluid in the chamber 36 must be increased in order to overcome the spring H depends upon the extent to which the spring has been compressed, by the plunger 62' through the operation of the handle 68 by the operator.

If, when the several parts of the control valve device 3 have been operated to lap position, as just described, the operator desires to decrease the degree of pressure of the fluid in chamber 6 of the fluid pressure motor, he may do so by relieving a portion of; the. pressure exerted on. the handle 68. When the operator does this, the

spring H moves the plunger 62 toward the left (ill thereby relieving some of the tension on the spring II. On a reduction in the pressure. exerted by spring H on the piston assembly the fluid in chamber 36 and the spring 56 acting on the opposite side of the piston assembly moves the assembly toward the left. Since the valve 48 is seated on'the valve seat 49 of the valve seat member 39 and thereby prevented from moving toward the left under the influence of the spring 55, the piston assembly and thereby the valve seat 54 on the valve seat member 35 move away from the valve 53.

With the valve seat 54 thus moved out of seal.- ingengagement with the valve 53, fluid under pressure will flow from chamber 36 and consequently from the chamber 6 of the fluid pressure motor to the atmosphere, by way of bores 14 and 15 in the piston assembly, chamber 66 and atmospheric passage 6 I.

Now when, due to the release of fluid under pressure from the chambers 36 and 6, the pressure of fluid in chamber 36 has been reduced to slightly below the adjusted control pressure of the spring H, the spring acts to move the piston assembly toward the right thereby moving the Valve seat 54 into sealing engagement with the valve 53. When this occurs further flow of fluid from the chambers 36 and 6 is out 01f and since no further reduction in the pressure of fluid in chamber 36 occurs, the piston assembly comes to a stop before it can impart any movement to the valve 48.

If it is desired to return the piston 5 of the fluid pressure motor to its neutral position without returning the selector valve portion of the control valve device to the neutral position it is only necessary to release all downward pressure from the operating handle 68, thereby permitting the spring H to move the plunger 66 to its normal position in which it is shown in Fig. 1 of the drawing. With the plunger in this position the piston assembly 32 and valves 48 and 53 assume their normal position as hereinbefore described. Under these conditions fluid under pressure in chamber 6 is permitted to flow to the atmosphere, by way ofpipe and passage 82, cavity 90, and passage 84 in the rotary valve l9, chamber I6, passage l8, flexible conduit l1, pipe and passage 31 and through the self-lapping regulating portion of the control valve device, as previously' described, thus permitting the spring 42 to move the piston 5 to its neutral position.

If the operator so desireshe may return the self-lapping regulating portion of the control valve device to its neutral position by moving the handle 68 from its left control position to neutral position. In neutral position both chambers 6 and 1 of the fluid pressure motor are connected to the atmosphere as hereinbefore described and springs 4! and 42 maintain the piston 5 of the motor in its neutral position.

It should here be mentioned, that if the operator s0 desires he may return the self lapping regulating portion of the control valve device 3 to neutral position, as above described, without permitting the handle 66 to return to its uppermost position. In this event fluid under pressure in chamber 6 is permitted toflow to the atmosphere by way of pipe and passage 82 and through the ports in the rotary valve [9, as previously described, to permit the piston 5 of the fluid pressure motor to return to neutral position. At the same time the rotary valve'chamb'er l6 is'main' tained charged with fluid under pressure to a value dependent uponthe amountthe handle 68 isdepressed. I I l I The control valve device? can beioperated in a manner similar tothat justflescribed for moving the piston 5 inthe opposite direction, that is, to the left of its neutral position. l i If the operator wishes to efiect m'ovement of the piston 5 of'the motor to the left he may do so by moving the operating handle 68 and thereby the self-lapping regulating portion H and the rotary'valve' IE! to the right of neutral position to its right control position. f

With the rotary valve I9 in this position, the chamber 1 of the fluid pressure motoris connected to the rotary valve chamber I6 by way of pipe and passage 83 and cavity 92 and passage 84 in the rotary valve; At the same time as this communication is established between chambers I and I 6, the chamber fi of the motor is connected to the atmosphere by way of pipe and passage 82, a cavity 93 in the'rotary valve and the exhaust passage 85, which will be'obvious from inspection of Fig. 2 of the drawing. 1

With the above communications established the handle 58 is depressed the desired amount and the self-lappingregulating portion of the control valve device operate'sas before described to supply fluid under pressure to the rotary valve chamber l6. 7

Fluid under pressure thereupon flows fromthe chamber Hi to chamber I by way of passage 84 and cavity 92 in the rotary valve l9 and passage and pipe 83, causing the piston 5 and attached rod 8 to move toward the left against the opposing action of the spring 4| to effect operation of any apparatus which may be connected thereto. When the pressure of fluid in chamber 1 and consequently in chamber 36 of the control valve device has been increased to the desired pressure determined by the amount the handle 68 is depressed, the self-lapping regulating portion or the control valve device will operate as previously described to move the valves 53 and 48 to lap position so as to retain the fluid under pressure in chamber 1 of the fluid pressure motor.

If, when the several parts of the control valve device have been operated to lap position, the operator desires to partially decrease the degree of pressure or fully release the pressure of fluid in chamber 1 without returning the selector valve portion ll of the control valve to its neutral position, he may do so by partially or fully releasing the downward pressure on the handle 58. When he does this the self-lapping regulating portion ll of the control valve device will operate as before described to open valve 53 and maintain the valve 48 closed. When this occurs fluid under pressure in chamber 1 will be permitted to flow to the atmosphere by way of pipe and passage 83, cavity 92 and passage 84 in the rotary valve l9, chamber l6, passage [8, flexible conduit I1 and through the self lapping reducing valve portion H of the control valve device as beforedescribed. v

When the pressure on the handle 68 has been partially relieved the release of fluid under pressure from chambers I and 36 will continue until the pressure of fluid in chamber 36 has been reducedto slightly below the adjusted control pressure of the spring H. When this occursthe regulating portion ll operates as previously described to cut off further release of fluid from the chambers 1. and 36 and retainfluid under pressure in said chambers to the desired degree. When the handle has been permitted toretum to its uppermost position, that is, when the downward pressure on the handle has been fully relieved, the pressure in chambers 9 and 36 is fully released through the above traced circuit and the springs 4i and 42' operate to maintain the piston 5 of the fluid pressure motor in its neutral position, as shown in Fig. l and as hereinbefore described. v

If it is desired to return the control valve device to neutral position the operator moves the handle 68 from its right control position to neutral position, whereupon the chambers 6 and I in the fluid pressure motor are connected to and maintained at atmospheric pressure, as previously described, Under these conditions the piston 5 of the motor is moved to and maintained in neutral position by means of the springs 4| and 42.

It will be seen that a manually operated control valve device constructed in accordance with the invention employs a selector valve portion which directs the flow of fluid under pressure to either of the two chambers of a double acting fluid pressure motor, depending upon the direction of movement of the operating handle away from the neutral position. In addition, this control valve device has a pressure regulating portion which controls the pressure of the fluid supplied to the selected chamber of the fluid pressure motor in accordance with the amount the operating handle is depressed from a normal operating position.

While one embodiment of the control valve device provided by my invention has been illustrated and described in detail, it should be understood that the invention 'is not limited to these details of construction, and that numerous changes and modifications may be made without departing from the scope of the following claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A fluid pressure control valve devicecomprising in combination, a casing having a rotatable part and a stationary part, a valve movable by said rotatable part to either one or another of a plurality of positions for selectively establishing various communications through which fluid under pressure is adapted to flow, actuating means for said rotatable part movable in one plane to position said valve, said actuating means being also operative independently of the valve positioning movement, and a self-lapping valve mechanism carried by said rotatable part controlled by the independent operation of said actuating means for varying the degree of the pressure of fluid in the communication established by said valve.

2. In a control apparatus for a fluid pressure system for controlling the supply of fluidunder pressure to and the release of fluid under pressure from said system, in combination, a casing having a rotatable part and a stationary part, a valve movable by said rotatable part to either one of a plurality of control positions for establishing one or another communication through which fluid under pressure is adapted to be supplied to the system to impart different operating characteristics to the system, and means including a self-lapping fluid pressure valve mechanism carried by saidrotatable part and rotatable about the axis of the valve to selectivelyv position the valve, said means being capable of control independently of the rotating movement of the valve for varying the degree of fluid pressure in the communication established by said valve.

3. In a control apparatus for a fluid pressure system for controlling the supply of fluid under pressure to and the release of fluid under pressure from said system, in combination, a casing having a rotatable part and a stationary part, a valve movable by said rotatable part to either one of a plurality of control positions for establishing one or another communication through which fluid under pressure may flow to or be released from the system to impart different operating characteristics to the system, means including a selflapping fluid pressure valve mechanism carried by the rotatable part and rotatable about the axis of said valve to selectively position the valve, said means being capable of control independently of the rotating movement for selectively controlling the supply of fluid under pressure to and the release of fluid under pressure from the system, through the communication established by said valve.

4. A fluid pressure control valve device comprising in combination, a casing having a rotatable part and a stationary part, a valve contained in said stationary part and movable to either one or another of a plurality of positions for selectively establishing various communications through which fluid under pressure is adapted to flow, actuating means carried by the rotatable part for selectively rotating said rotatable part in either one of two directions for positioning the valve, said actuating means being operative in a difierent direction independently of the rotatable part and valve positioning movement, and self-lapping fluid pressure regulating means carried by the rotatable part and controlled by the degree of independent movement of said actuating means for varying the degree of fluid pressure in the communication established by said valve.

5. A fluid pressure control valve device comprising in combination, a casing comprising a rotatable portion and a stationary portion, a valve movable by said rotatable portion to either one or another of a plurality of positions for selectively establishing various communications through which fluid under pressure is adapted to flow, self-lapping fluid pressure regulating means carried by said rotatable portion for varying the degree of the pressure of fluid in the communication established by said valve, actuat-ing means movable in one plane for positioning said rotatable portion and said valve and movable independently of the valve positioning movement in a plane at right angles to the first mentioned plane for efiecting operation of said pressure regulating means.

6. In a control apparatus for a fluid pressure system for controlling the supply of fluid under pressure to and the release of fluid under pressure from said system, in combination, a casing having a rotatable part and. a stationary part, a first valve device comprising a self-lapping fluid pressure valve mechanism carried by the rotatable part for controlling the supply and release of fluid under pressure, a second valve carried by the stationary part and selectively movable to either one or another of a plurality of positions for establishing various communications through which said valve device is adapted to supply or release fluid under pressure, and actuating means movable in both a horizontal plane and a vertical plane, said actuating means when moved in a horizontal plane being adapted to position said rotatable part and said second valve device and when moved in avertical plane being adapted to actuate said first valve device to supply or release fluid under pressure through the communication established by said valve.

7. A fluid pressure control valve device comprising in combination, a control element opera-' tive in both a horizontal plane and a vertical plane, a double acting fluid pressure motor,

means governed by movement of said element in a horizontal plane for establishing one or another communication through whichfluid under pressure is adapted to be supplied to or released able by said rotatable part to either one or another of a plurality of positions for selectively establishing various communications through which fluid under pressure is adapted to flow, a control element having a neutral position and being rotatable therefrom in either directionto, position said rotatable part and said valve, said control element also having a normal raised position and being depressible therefrom independently of the rotatable part and valve positioning movement, and self-lapping valve means carried by the rotatable part and controlled by the degree of movement of the element between its raised and depressed positions for varying, the degree of fluid pressure in the communication established by said valve.

9. In a control apparatus for a fluid pressure motor, in combination, a valve movable in one direction to establish a communication through which fluid under pressure may be supplied to the motor to impart certain operating characteristics to the motor and movable in the opposite direction to another position to establish a different communication through which fluid under pressure may be supplied to the motor to impart different operating characteristics to the motor, actuating means operative upon movement in one direction for positioning said valve, and control means carried by said actuating means and operative independently of the operation of said valve for supplying fluid under pressure to the motor by Way of the respective communication.

10. In a control system for actuating a double acting fluid pressure motor, said motor comprising a movable abutment subject to the pressure of fluid in chambers on opposite sides thereof,

said abutment having a neutral position and being operative upon movement therefrom in either direction, in combination, a rotary valve having a neutral position in which both of said chambers are connected to the atmosphere and being operative upon movement therefrom in either direction to cut oii communication between one of said chambers and the atmosphere and to establish communication through which fluid under pressure may be supplied to said chamber, means for rotating said rotary valve, said means carrying a fluid pressure regulating mechanism for supplying fluid under pressure to said rotary valve and being controlled independently of the rotary movement for effecting operation of the regulating mechanism to supply fluid under pres sure to the said-one chamber through the communication established by the rotary valve.

ll A fluid pressure control valve device come prising in combination, a valve movable to either one or another ofa plurality of positions for selectively establishing various communications through which the pressure of fluid is adapted to begvaried, an actuating handle movable in a horizontal plane between a neutral position and a plurality of control positions to position said valve, said handle beingoperative in a vertical plane between an uppermost position and a fully depressed position'independently of the valve positioning movement, and self-lapping valve means controlled according to, the degree of movement of saidhandle between said upper most position and said fully depressed, position for varying the degree of fluid pressure in the communication established by said valve.

,. 12. A fluid pressure control valve device comprising in combination, a rotary valve operative to, either one or another of a plurality of positions for selectively establishing.v various communications through which the fluid under pres-, sure is adapted to be supplied, a body casing comprising a rotatable part and a stationary part, ashaft rotatablymounted in said stationarypart for rotating said valve, said rotatable part being secured to] said shaft and slidably mounted in said stationary part for rotating said shaft, a handle'movable in one plane to position said rotatable part and said valve, said handle being operative independently of the valve positioning movement, and a self-lapping valve mechanism carried by and included in said rotatable part adapted to be controlled by the independent operation of said handlefor varying the degree of fluid pressure in the communicavtion established by said rotary valve.

aarams 13. A fluid pressure control valve device comprising in combination, a selector valve comprising a body section and a bracket section, a

rotary valve mounted in said-selector valve having a neutral position and rotatable in either direction therefrom to establish one or another communication through which fluid under pressure is adapted to be supplied, a shaft rotatably mounted in said body section for rotating said valve, a member secured to saidshaft and slidably mounted on said body section for rotating said shaft and to thereby position said valve,-

said member being constructed and arranged to include a fluid pressure self-lapping mechanism, and an actuating handle for positioning said member and thereby thevalve, said handle being operative independently of the valve positioning movement for effecting operation of the selflapping mechanism to vary the fluid pressure in the communication established by said rotary valve.

14. A fluid pressure control valve device comprising in combination, a selector valve device including a body casing, a shaft rotatably mounted in said casing, a rotary valve rotatable with EDWARD E. VON BEHREN. 

